The word "brus" can have various synonyms, depending on its context. As a verb, it can mean to rub or scrape something with a rough motion. In this case, terms like grind, scrub, scour or abrade would be appropriate synonyms. As a noun, "brus" can refer to a rough, harsh manner, implying lack of politeness. In this sense, terms like blunt, curt, abrasive, or brusque can be used as synonyms. However, "brus" is not strictly negative and can also indicate a straightforwardness that is not intended to be rude. Synonyms like direct, honest, candid, or frank would be appropriate in such cases.